/Engine/Plugins/MeshPainting/Source/MeshPaintingToolset/Public/MeshTexturePaintingTool.h
void GatherTextureTriangles ( [IMeshPaintComponentAdapter](API\Plugins\MeshPaintingToolset\IMeshPaintComponentAdapter) * Adapter, int32 TriangleIndex, const int32 VertexIndices, [TArray](API\Runtime\Core\Containers\TArray)< [FTexturePaintTriangleInfo](API\Editor\MeshPaint\FTexturePaintTriangleInfo) > * TriangleInfo, [TArray](API\Runtime\Core\Containers\TArray)< [FTexturePaintMeshSectionInfo](API\Editor\MeshPaint\FTexturePaintMeshSectionInfo) > * SectionInfos, int32 UVChannelIndex )